Today on Facebook my friend Walter Perry posted this infographic about vaccine effectiveness in the United States. The infographic didn't have a link to the source so I did a little research and I think that it was created by Leon Farrant. The infographic compares morbidity prior to "vaccine era" in the U.S. to current reports of cases of diseases that we commonly vaccinate against.
Applications for Education
As you can see above "vaccine era" is not defined in the infographic. The lack of detail in the infographic opens it up to being a source of potential research questions for your students. Ask your students to define "vaccine era" or have them research when the various vaccines became commonly available.